The Packing Nut, cataloged under National Stock Number 4730-00-274-9667, is classified within Federal Supply Class 4730 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is Northrop Grumman Systems Corporation Div Marine Systems. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 50 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-274-9667 |
| Primary Part Number | 20051 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — No Item Name Available |
| Manufacturer | Northrop Grumman Systems Corporation Div Marine Systems |
| Status | ACTIVE |
| Thread Length | 0.125 INCHES NOMINAL IN |
| Seat Angle in Deg | 65.0 |
| Hole or Slot Quantity | 6 |
| Screw Thread Series Designator | UNF |
| Major Unthreaded Outside Diameter | 1.500 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Hole Diameter | 0.219 INCHES NOMINAL IN |
| Material Hardness Rating | 28.0 ROCKWELL C NOMINAL |
| Style Designator | ROUND, EXTERNAL THREAD, INVERTED FLARE |
| Strength Rating | ERR-060 |
| Screw Thread Location | EXTERNAL |
| Thread Size | 1.250-12 |
| Smallest Inside Diameter | 0.578 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Material | NICKEL ALLOY |
| Thread Class | 3A A |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| DD453S49-49PC19 | Naval Ship Systems Command (USA) |
| CVE105S4903-251094HC19 | Naval Ship Systems Command (USA) |
| DD445S4901-12PC19 | Naval Ship Systems Command (USA) |
| DD423S49-56PC19 | Naval Ship Systems Command (USA) |
| CVE105S4902-251093HC19 | Naval Ship Systems Command (USA) |
| D15-443CPC19 | Westinghouse Electric Corp (USA) |
| CVE105S4902-251100HC19 | Naval Ship Systems Command (USA) |
| DD453S49-49PC19 | Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir (USA) |
| CVE105S4903-251101HC19 | Naval Ship Systems Command (USA) |
| D15-661CPC19 | Westinghouse Electric Corp (USA) |
| D15-443IPC19 | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
| D15-75EBPC19 | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
| 17Y2454PC19 | Naval Ship Systems Command (USA) |
| DD453S49-55PC19 | Naval Ship Systems Command (USA) |
| S4902-566938PC19 | Naval Ship Systems Command (USA) |
| DD692S4901-245175PC19 | Naval Ship Systems Command (USA) |
| D15-661KPC19 | Westinghouse Electric Corp (USA) |
| D15-753CPC19 | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
| D15-443JPC19 | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
| D15-7621IPC19 | Westinghouse Electric Corp (USA) |
NSN 4730-00-274-9667 is a Packing Nut, manufactured by Northrop Grumman Systems Corporation Div Marine Systems, classified under FSC 4730 (No Item Name Available). Status: active.
NSN 4730-00-274-9667 has 50 cross-referenced part numbers: DD453S49-49PC19 (Naval Ship Systems Command), CVE105S4903-251094HC19 (Naval Ship Systems Command), DD445S4901-12PC19 (Naval Ship Systems Command), DD423S49-56PC19 (Naval Ship Systems Command), CVE105S4902-251093HC19 (Naval Ship Systems Command) and 45 more.
There are 12 known substitutes for 4730-00-274-9667: 5133-00-228-1338, 3110-00-293-9163, 6625-00-580-3684 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 20051: Thread Length: 0.125 INCHES NOMINAL IN; Seat Angle in Deg: 65.0; Hole or Slot Quantity: 6; Screw Thread Series Designator: UNF. 17 total characteristics are documented in the Federal Logistics Information System.